- Comment on why optimize_link_read_pointers is safe on an Athlon64

[coreboot.git] / src / northbridge / amd / amdk8 / coherent_ht.c

diff --git a/src/northbridge/amd/amdk8/coherent_ht.c b/src/northbridge/amd/amdk8/coherent_ht.c
index f90b236f2a263e234f22092aa6652911329139b2..1c795ade3e5c77c79650b1ac79ec1891fb5fce74 100644 (file)
--- a/src/northbridge/amd/amdk8/coherent_ht.c
+++ b/src/northbridge/amd/amdk8/coherent_ht.c
@@ -606,6 +606,7 @@ static int optimize_link_read_pointers(unsigned nodes, int needs_reset)
                for(link = 0; link < 3; link = link + 1) {
                        uint32_t link_type;
                        unsigned reg;
+                       /* This works on an Athlon64 because unimplemented links return 0 */
                        reg = 0x98 + (link * 0x20);
                        link_type = pci_read_config32(f0_dev, reg);
                        if (link_type & LinkConnected) {